Belgian Model 31 Adrian helmet re-used by Gendarmerie

These pictures show a Belgian M31 Adrian helmet. Re-used by the Gendarmerie.

It's a known fact that many army  M31 helmets were painted black for use by the Belgian Gendarmerie.

I noticed that this helm was painted black manually and I was curious to find out if it was a former army helmet.

In order to figure this out I removed the lionhead and to my surprise I found an emblem painted underneath de lionhead. On the world war helmets forum  Found the origine of the insigna, see:

http://www.world-war-helmets.com/forum/index.php?showtopic=853&hl=gardes+wallonnes